Hi, I am new to Qt3D and there's a few things I was wondering how to achieve:
- I need to read and write an opengl texture from C++. For example, I am rendering a scene into a texture during a first render pass, and then performing some postprocess effect before rendering that texture in a fullscreen quad during a second render pass. I would like to access that texture from C++, and can't manage to do that. I've found the classes *QTextureImageData*/*QTextureData*/ *QTextureDataGenerator*, but I don't know if that's really what I'm looking for and if it is, how to use it. - I also would like to send preprocessor instructions to a shader from C++/QML and I don't know if this is possible. For example, if I want to use *#ifdef* in a shader with a value defined in C++, I would need to send that value to the shader just like *QParameter* do with uniforms. I've searched in the documentation and on internet, but I didn't find anything. Any help would be highly appreciated :-) Sincerely, Léo.
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